Grandfather Mountain rises above sea level, and due to the considerable
elevation gain the mountain boasts 16 distinct ecological communities. The mountain is famous for its rugged character, and is home to many hidden caves and significant cliffs. It has been reported that Grandfather Mountain has experienced some of the "highest surface wind speeds ever recorded," with unverified speeds in excess of . More recently, Grandfather Mountain has upgraded their wind equipment in order to help resolve controversy over these high wind recordings. Notably however, the new equipment is located on the Swinging Bridge of the attraction. The new instruments may not record the highest wind speeds on the mountain, which extends another above the current location of the equipment. The primary
massif (ridge) of the mountain is oriented roughly north to south, and features four named peaks: Calloway Peak (5,964 ft.), Attic Window Peak (5,949 ft.), MacRae Peak (5,844 ft.), and Linville Peak (5,295 ft.). Although not as high as the adjacent Calloway and Attic Window Peaks, MacRae is much more difficult to reach due to difficult and exposed approaches from both the north and south. Two rivers have headwaters on Grandfather Mountain, the
Linville River, flowing east, and the
Watauga River, flowing west. Many lesser streams originate on the slopes of Grandfather, including: Upper Boone Fork, Little Wilson Creek,
Wilson Creek (North Carolina), Stack Rock Creek, and others. On top of Grandfather Mountain, like many mountain peaks above 5000' in North Carolina, grows an "island" of
Southern Appalachian spruce-fir forest. Though the forest was largely devastated during the 20th century by the introduction of the non-native
balsam wooly adelgid, a remnant of this biome still exists on Grandfather Mountain. Many of these fir trees have been permanently bent by the high winds that often prevail from the west. In addition to fir trees, these "mountaintop island" biomes are a valuable and threatened habitat for many other
flora and
fauna suited to survival at higher elevation. ==History==